Foot Ring Locking Mechanism for Continuous Seat Height Adjustment

The patent replaces the traditional screw-threaded mechanical system with a nylon slide mechanism that moves along the tube. The nylon slide engages with longitudinal grooves in the tube, allowing smooth continuous adjustment rather than discrete incremental movement. This substitution of mechanical systems resolves the contradiction by enabling both ease of operation and continuous adjustment precision.

The patent introduces a nylon slide as an intermediary component between the fixing mechanism and the tube. The nylon slide distributes the clamping force along its contact surface with the tube, preventing localized stress concentration that would cause sheet metal deformation. This intermediary element maintains both connection simplicity and gas seal reliability by replacing direct point-contact fixation with distributed surface contact.

The patent replaces the frusto-conical gripping mechanism with a nylon slide system that moves along longitudinal grooves in the tube. The nylon slide maintains constant contact with the tube surface through its elastic properties, providing continuous sealing without the time-consuming adjustment operations required by conical mechanisms. This substitution resolves the contradiction by enabling quick adjustment while maintaining seal integrity over time.

The patent designs a universal nylon slide mechanism that accommodates both gas pump tubes and vertical support tubes through its engagement with longitudinal grooves. The nylon slide's elastic properties and groove-following geometry allow it to adapt to different tube types and diameters, providing secure connection without requiring hole engagement. This universal design resolves the contradiction by maintaining connection security while achieving versatility across different tube configurations.